import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import CarList from '../views/CarList'
import DriverList from '../views/DriverList'
import Welcome from '../components/Welcome'



Vue.use(VueRouter)
const router = new VueRouter({

  routes: [
    { path: '/', redirect: '/login' },
    { path: '/login', component: Login },
    {
      path: '/home', component: Home,
      redirect: '/welcome',
      children: [
        { path: '/welcome', component: Welcome },
        { path: '/carlist', component: CarList },
        { path: '/driverlist', component: DriverList }]
    },
  ]
})
// 挂载路由导航守卫
router.beforeEach((to, from, next) => {
  // to 将要访问的路径
  // from 代表从哪个路径跳转而来
  // next 是一个函数，表示放行
  //     next()  放行    next('/login')  强制跳转

  if (to.path === '/login') return next()
  // 获取token
  const tokenStr = window.sessionStorage.getItem('token')
  // console.log(tokenStr)
  if (!tokenStr) return next('/login')
  next()
})

export default router
